Hammer



FIG. 1 is an isometric view of a front, top, and left side of an ornamental design for a hammer;

FIG. 2 is a left side elevational view of the hammer of FIG. 1;

FIG. 3 is a right side elevational view of the hammer of FIG. 1;

FIG. 4 is a rear elevational view of the hammer of FIG. 1;

FIG. 5 is a front elevational view of the hammer of FIG. 1;

FIG. 6 is a top plan view of the hammer of FIG. 1; and,

FIG. 7 is a bottom plan view of the hammer of FIG. 1.

The dash-dash-dash-dash lines are for the purpose of illustrating environmental structure and form no part of the claimed design. The dot-dash-dot-dash lines are for the purpose of illustrating the boundaries of the claimed design. 

CLAIM The ornamental design for a hammer, as shown and described. 